Decree affirmed. This is an appeal by a self insurer from a decree of the Superior Court awarding total incapacity compensation to the employee in accordance with the decision of the reviewing board. On October 14, 1957, the employee was injured while loading a truck for his employer, the self insurer. Shortly thereafter, he was treated at a clinic where his injuries were diagnosed as hematoma of the right buttock with traumatic contusion and myositis with marked discoloration of the right anal region. Although he suffered pain, the employee continued working until May 23, 1958, at which time he suffered extreme pain in his right groin in lifting a box from a truck. It was discovered that he had sustained a left inguinal hernia, for which he underwent an operation in June of 1958. The employee returned to work in August but the pain in his groin grew progressively worse and he was obliged to quit work on October 30, 1958. A medical examination revealed that he had an extensive carcinoma of the prostate and seminal vesicles with metastases to the bones. This condition necessitated an operation (orchidectomy), and the employee has been totally incapacitated ever since. The foregoing facts were found by the single member and are amply warranted by the evidence. The employee's injuries of October 14, 1957, and May 23, 1958, arose out of and in the course of his employment, and no contention is made to the contrary. The present controversy centers around the following finding of the single member, which was adopted and affirmed by the reviewing board: "I . . . find, on the medical evidence, that this cancerous condition predated . . . [the employee's] original injury; that the injuries incurred in the fall . . . on October 14, 1957, and the injury to his groin on May 23, 1958, with the subsequent herniorrhaphy accelerated the course of his neoplastic disease, so that its progress was more rapid than it would have been had the injuries not occurred; that this moderately rapid progression of his disease eventually necessitated an orchidectomy and culminated in total disability." Nothing would be gained by reciting the evidence pro and con on this issue. Suffice it to say that there was medical evidence which supported the finding of the board. See Murphy's Case, 328 Mass. 301; Luczek's Case, 335 Mass. 675. A finding supported by evidence will be upheld unless vitiated by error of law, and no such error appears. Brown's Case, 334 Mass. 343, 346. Costs under G. L. c. 152, Section 11A, shall be allowed by the single justice.

Order sustaining demurrer affirmed. The declaration in contract alleged (1) a writing by the defendant, dated September 19, 1957, granting to the plaintiff "a first option" to buy described land owned by the defendant at a price not to exceed $1,500; (2) a writing by the defendant, dated August 6, 1958, informing the plaintiff that, if he did not exercise his "option" by August 18, 1958, the defendant would sell to another; (3) a writing by the plaintiff, dated August 13, 1958, exercising the "option" and "offering"

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$500 for the land; and (4) a sale by the defendant to another. A demurrer to the declaration was properly sustained. The writings of the defendant were at most an invitation for an offer within a stated maximum. The communication from the plaintiff was an offer which the defendant was free to accept or reject or ignore. Cronin v. National Shawmut Bank, 306 Mass. 202, 210, and cases cited.